Question

Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point)%0D%0AResponses%0D%0A%0D%0AThe model should show 32 protons and 59 neutrons. %0D%0AThe model should show 32 protons and 59 neutrons. %0D%0A%0D%0AThe model should show 59 protons and 27 neutrons. %0D%0AThe model should show 59 protons and 27 neutrons. %0D%0A%0D%0AThe model should show 27 protons and 27 neutrons. %0D%0AThe model should show 27 protons and 27 neutrons. %0D%0A%0D%0AThe model should show 27 protons and 32 neutrons.

Answer 1

To correctly model a cobalt atom with a mass number of 59 and an atomic number of 27:

- The atomic number (27) indicates the number of protons in the nucleus of the atom.
- The mass number (59) is the total number of protons and neutrons in the nucleus.

To find the number of neutrons, use the formula:

\[
\text{Number of neutrons} = \text{Mass number} - \text{Number of protons}
\]

So for cobalt:

\[
\text{Number of neutrons} = 59 - 27 = 32
\]

Thus, a cobalt atom has 27 protons and 32 neutrons.

The correct statement about the model is: **The model should show 27 protons and 32 neutrons.**